Now I need enable TSL 1.1 on that web server, and by going through options I couldn't find anything that would give me a option to specify version of TLS. TLS is selected as sslProtocol in TomcatWebSSLConnector options, but it's using 1.0. Is it even possible to use TLS 1.1 on this version of WASCE/Java?

Hello,
we have managed to enable TLSv1.1 on WAS CE 2.1.1.5 by upgrading IBM Java to newest IBM JavaSE6 (SR10).
We changed the config.xml file and set sslProtocol property of TomcatWebSSLConnector to TLSv1.1 which resulted in successful TLS 1.1 connection.

But now, when we try to connect with a client which doesn't support TLS 1.1 (only TLS 1.0) we get an refused connection.